# <grid-container> Development


The **<grid-container>** component is the root container of the grid layout. Within the root container, you can use **<grid-row>** and **<grid-col>** for the grid layout. For details, see [grid-container](../reference/arkui-js/js-components-grid-container.md).


## Creating a <grid-container> Component

Create a **<grid-container>** component in the .hml file under **pages/index** and add a [**<grid-row>**](../reference/arkui-js/js-components-grid-row.md) child component.


```
<!-- index.hml -->
<div class="container">
  <grid-container id="mygrid" columns="5" gutter="20px" style="background-color: pink;">
    <grid-row style="height:100px;justify-content:space-around;width: 80%;background-color: #f67002;margin-left: 
      10%;"></grid-row>
    <grid-row style="height:300px;justify-content:space-around;background-color: #ffcf00;width: 100%;"></grid-row>
    <grid-row style="height:150px;justify-content:space-around;background-color: #032cf8;width: 100%;"></grid-row>
  </grid-container>
</div>
```


```
/* xxx.css */
.container{
  flex-direction: column;
  background-color: #F1F3F5;
  width: 100%;
  justify-content: center;
  align-items: center;
}
```

![en-us_image_0000001276162725](figures/en-us_image_0000001276162725.png)

> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE:**
> **&lt;grid-container&gt;** supports only **&lt;grid-row&gt;** as a child component.


## Methods

Click the **&lt;grid-container&gt;** component to call the **getColumns**, **getColumnWidth**, and **getGutterWidth** methods to return the number of columns in the grid container, and column width and gutter width of the grid container. Press and hold the component to call the **getSizeType** method to return the size-responsive type of the grid container (**xs**|**sm**|**md**|**lg**).


```
<!-- index.hml -->
<div class="container">
  <grid-container id="mygrid" columns="6" gutter="20px" style="background-color: pink;padding-top: 100px;" 
    onclick="getColumns" onlongpress="getSizeType">
    <grid-row style="height:100px;justify-content:space-around;background-color: #4cedf3;width: 20%;margin-left: 
      40%;"></grid-row>
    <grid-row style="height:150px;justify-content:space-around;background-color: #4cbff3;width: 50%;margin-left:
      25%;"></grid-row>
    <grid-row style="height:200px;justify-content:space-around;background-color: #465ff6;width: 80%;margin-left: 
      10%;"></grid-row>
    <grid-row style="height:200px;justify-content:space-around;background-color: #5011ec;width: 100%;"></grid-row>
  </grid-container>
</div>
```


```
/* xxx.css */
.container{
  flex-direction: column;
  background-color: #F1F3F5;
  width: 100%;
  justify-content: center;
  align-items: center;
}
```


```
// index.js
import prompt from '@system.prompt';
export default {
  data:{
    gutterWidth:'',
    columnWidth:'',
    columns:'',
  },
  getColumns(){
    this.$element('mygrid').getColumnWidth((result)=>{
      this.columnWidth = result;
    })
    this.$element('mygrid').getGutterWidth((result)=>{
      this.gutterWidth = result;
    })
    this.$element('mygrid').getColumns((result)=>{
      this.columns= result;
    }) 
    setTimeout(()=>{              
      prompt.showToast({duration:5000,message:'columnWidth:'+this.columnWidth+',gutterWidth:'+
      this.gutterWidth+',getColumns:'+this.columns})
    })
  },
  getSizeType(){
      this.$element('mygrid').getSizeType((result)=>{
      prompt.showToast({duration:2000,message:'get size type:'+result})
    })
  },
}
```

![en-us_image_0000001231843088](figures/en-us_image_0000001231843088.gif)


## Adding &lt;grid-col&gt;

After adding a **&lt;grid-row&gt;** child component to **&lt;grid-container&gt;**, add a **&lt;grid-col&gt;** child component to **&lt;grid-row&gt;** to form a layout.


```
<!-- index.hml -->
<div class="container">
  <grid-container id="mygrid" columns="4" gutter="0" style="background-color: pink;" onclick="getColumns" onlongpress="getSizeType">
    <grid-row style="height: 100px;justify-content: space-around;background-color: #4cbff3;width: 100%;">
      <grid-col span="0">
        <div style="align-items: center;justify-content: center;height: 100%;width: 100%;">
          <text style="color: dodgerblue;" onclick="getCol">top</text>
        </div>
      </grid-col>
    </grid-row>
    <grid-row style="height:500px;justify-content:space-around;background-color: #3b55ef;width: 100%;">
      <grid-col span="0" style="width: 20%;">
        <div style="align-items: center;justify-content: center;height: 100%;width: 100%;">
          <text style="color: dodgerblue;">left</text>
        </div>
      </grid-col>
      <grid-col span="0" style="background-color:orange;width: 80%;">
        <div style="width: 100%;height: 100%;align-items: center;justify-content: center;">
          <text>right</text>
        </div>
      </grid-col>
    </grid-row>
    <grid-row style="height: 100px;justify-content: space-around;background-color: #4cbff3;width: 100%;">
      <grid-col style="background-color:#c075ef;" span="0">
        <div style="width: 100%;height: 100%;padding: 20px;align-items: center;justify-content: center;">
          <text>bottom</text>
        </div>
      </grid-col>
    </grid-row>
  </grid-container>
</div>
```


```
/* xxx.css */
.container{
  flex-direction: column;
  background-color: #F1F3F5;
  width: 100%;
  justify-content: center;
  align-items: center;
}
text{
  color: white;
  font-size: 40px;

```

![en-us_image_0000001231683124](figures/en-us_image_0000001231683124.png)

> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE:**
> **&lt;grid-row&gt;** supports only **&lt;grid-col&gt;** as a child component. You can add content only to **&lt;grid-col&gt;**.


## Example Scenario

In this example, the content in the list is output cyclically to create a grid layout. When the user pulls down the screen, the **refresh** method is triggered. In this case, a piece of data is added to the list and **setTimeout** is set to refresh the request data.


```
<!-- index.hml -->
<div class="container">
  <refresh refreshing="{{fresh}}" onrefresh="refresh">
    <grid-container id="mygrid" gutter="20" style="margin: 10px;">
      <grid-row style="height:200px;width: 100%;background-color: #e7e7e2;margin-top: 50px; padding: 0px 20px;border-radius: 15px;" for="item in list">
        <grid-col span="0" style="width: 40%;">
          <div style="align-items: center;justify-content: center">
            <image src="{{item.src}}" style="object-fit: contain;border-radius: 30px;"></image>
          </div>
        </grid-col>
        <grid-col span="0" style="width: 60%;">
          <div style="align-items: center;justify-content: center;width: 100%;height: 100%;text-align: center;">
            <text>image{{item.id}}</text>
          </div>
        </grid-col>
      </grid-row>
    </grid-container>
  </refresh>
</div>
```


```
/* xxx.css */
.container{
  flex-direction: column;
  background-color: #F1F3F5;
  width: 100%;
}
text{
  color: #0a0aef;
  font-size: 60px;
}
```


```
// index.js
import prompt from '@system.prompt';
export default {
  data:{
    list:[
      {src:'common/images/1.png',id:'1'},
      {src:'common/images/2.png',id:'2'},
      {src:'common/images/3.png',id:'3'}
    ],
    fresh:false
  },
  refresh(e) {
    prompt.showToast({
      message: 'refreshing'
    })
    var that = this;
    that.fresh = e.refreshing;
    setTimeout(function () {
      that.fresh = false;
      that.list.unshift({src: 'common/images/4.png',id:'4'});
      prompt.showToast({
        message: 'succeed'
      })
    }, 2000)
  }
}
```


![en-us_image_0000001276003501](figures/en-us_image_0000001276003501.gif)

## Samples

The following sample is provided to help you better understand how to develop the **\<grid>** component:

[`JsGrid`: grid (JavaScript, API 8)](https://gitee.com/openharmony/app_samples/tree/master/UI/JsGrid)